Obama calls slain border patrol agent's family

10/3/12 11:05 AM EDT

President Obama called the family of slain border patrol agent Nicholas Ivie in a late Tuesday call.

"The president expressed his sadness for the family's loss, and his gratitude for Agent Ivie's selfless service to his nation. The president told the family they are in his thoughts and prayers and made clear that his administration was doing everything it could to locate those responsible for this tragic event," according to a readout provided by the White House.

Two agents were shot after responding to a possible border incursion outside of Tucson on Tuesday. Ivie was killed, while the other agent was treated for non-life treating injuries.